JP2002310680A5 - - Google Patents

Description

[Title of the Invention] Traffic safety information provision method and program for traffic safety information provision
[Claim of claim]
1. Having a navigation function, a position measurement function, and a mobile telephone function mounted on a mobile objectMobileMobile phone network from the server side to the terminal, InternetVia a communication network consisting ofRoute hazards on the map that the terminal requestsEvery timeIn the traffic safety information provision method which provides information,
The terminal is
A first memory storing navigation map data of a moving body to which latitude and longitude are assigned;
A dangerous area on the road of the navigation map data and a second memory in which link information of the dangerous area is stored,
The navigation map data is displayed on the screen, and a route from the departure point of the map on the screen to the destination is retrieved from the navigation map data of the first memory and displayed on the screen, and the route is communicated Said server over the networkSending to the
The own position measured by the position measurement function is sequentiallyLoading in the third memory,
Sent from the serverTheDangerous area of the route andThe link information linked to the danger areaTheStore in the second memoryStage,
Every time the self-location is determined, the traveling direction is determined from the previous self-location and the current self-location, and the dangerous area of the route existing in this traveling direction is determined.From the second memoryStage of searching,
The danger areaOn the route of the map of the screenTogether with the allocation corresponding to the allocated dangerous areaLink informationTheDisplay on the screenStage, and
The self position isOn the root of the screenWhen it no longer exists in the allocated risk area,Link informationOn the screen ofdisplayas well asDangerWith the stage of stopping the area allocation
And the server is
And a fourth memory storing map data to which latitude and longitude are allocated.,
In the danger area of the road of the map data, the danger areaPolygons indicating the shape of the information provided in the danger area, degree of dangerinformationSaidLinkAssociate informationWith the fifth memory to memorizeEquipped with
The dangerous area which receives the route from the terminal and exists on the routeLinkInformation andRead from the fifth memorySaidTerminalSend to
A traffic safety information provision method characterized by having.
[Claim 2]The dangerous area is an intersection where roads intersect,
SaidLinkInformation is
It includes polygons of the shape of the intersection viewed from above, and surrounding polygons showing the shapes of surrounding features that surround the intersection.,
The risk information is
At least the shape of the intersection, the slope of the road leading to the intersection, the radius of curvature of the road, the provided information, the past accident history, and the parameter values obtained by evaluating the surrounding features surrounding the intersectionThe traffic safety information provision method according to claim 1, wherein the traffic safety information is provided.
3. The server according to
Information related to the dangerous area of the route from outside via Internet alwaysTo storageCollect and this informationLink to the risk informationThe traffic safety information provision method according to claim 1 or 2, characterized in that:
[Claim 4]The terminal is
A new risk degree is calculated from the current speed obtained from the current self position and the previous self position and the provision information of the link information of the danger area of the route, and this is notified by voice
4. The traffic safety information provision method according to claim 1, 2 or 3, characterized in that:
[5] The danger of the route on the map, having the navigation function, the position measurement function and the mobile phone function mounted on the mobile bodyEvery timeTraffic safety information offer that provides informationThe program of
On the computer,
A means for storing navigation map data of a moving body to which latitude and longitude have been allocated in a first memory,
Means for storing the dangerous area on the road of the navigation map data and the link information of the dangerous area in a second memory,
Means for displaying the navigation map data on a screen, searching a route from a departure point of the map on the screen to a destination point from navigation map data of the first memory, and displaying the route on the screen
The information of this route is transmitted to the server via the communication networkMeans for transmitting to the
The own position measured by the position measurement function is sequentially, Into the third memorymeans,
Risk area of the route transmitted from the server and the risk areaLink information linked toTheIn the fourth memoryMeans to memorize,
Every time the self-location is determined, the traveling direction is determined from the previous self-location and the current self-location, and the danger area existing in this traveling direction is determined.From the fourth memoryMeans to search,
The danger areaOn the route of the map of the screenTogether with the allocation corresponding to the allocated dangerous areaLinkInformation aboveDisplay on screenmeans,
When the own position no longer exists in the allocated danger area,LinkInformation of the aboveDisplay on screenas well asDangerMeans of stopping area allocation
AsTo make it workTraffic safety information program.
Detailed Description of the Invention
[0001]
Field of the Invention
The present invention can provide traffic safety information that can provide information on dangerous intersections in more detail to a mobile personal computer having a navigation function used for mobile bodies such as cars, trains, ships, tourist buses, taxis, bicycles, and people. It relates to the delivery method.
[0002]
[Prior Art]
In recent years, personal computers have become very popular among companies, groups, and families, and it has become possible to count risk factors for traffic accidents.
[0003]
The first risk factor is poor visibility (including intersections), the second is poor traffic (short, confusing, difficult to see, etc.), the third is easy to speed, the fourth can not be stopped, The fifth place is difficult to see on the uphill, the sixth place has the same road width, the seventh place is the shape of an intersection, the eighth place is traffic volume, and the ninth place is illegal parking etc.
[0004]
A number of systems have been filed to notify such risk factor information to avoid danger.
[0005]
For example, the traffic information providing system in JP-A-10-97694 converts traffic information for each section from the central unit into traffic information for each zone block in advance.
[0006]
Then, it is possible to request traffic information by designating the departure place and the destination for the traffic information user, and in response to the traffic information request from the traffic information user, it is possible to request the traffic information from the departure place to the destination. Traffic information corresponding to the request of the traffic information user combining traffic information (congestion, accident, etc.) for each zone block on the route is created and provided via a communication line. As a result, specific and detailed traffic information that the traffic information user wants to obtain is provided to the traffic information user, and the traffic information user can select an optimal route.
[0007]
In addition, there are also vehicles that receive distribution of various contents via a mobile wireless network and the Internet, and those that receive contents distribution of scenic spots, hot springs, restaurants, etc. while being carried by humans. Such a mobile personal computer has a mobile phone function and a GPS function, and receives the distribution of the aforementioned content.
[0008]
Then, for content distribution, the content distribution center distributes various types of content via a mobile wireless network, and the user uses a method of receiving desired content by selecting a software key on the screen, or using a mobile phone function. There is a system that receives distribution of various contents via the Internet.
[0009]
In addition, there is also a region limited service that delivers content only to a predetermined zone of the mobile telephone network. For example, according to Japanese Patent Laid-Open No. 2000-330909, user terminals in a group (Tokyo area, Osaka area) are connected to a provider via a dedicated line, and user terminals are connected to a Web (web) page via a dedicated line, the Internet, etc. Make a request to send information.
[0010]
Then, the location area of the user terminal is determined from the IP address of the user terminal, and the Web server selects Web data information based on the determined location area of the user terminal, and the user terminal (car navigation, terminal with navigation function, etc. Send to).
[0011]
[Problems to be solved by the invention]
Although the above-mentioned system distributes various contents (including traffic information) collected in advance to terminals such as car navigation systems, it does not distribute the shape of the intersection, the shape of the dangerous place, and the degree of risk.
[0012]
That is, since the car navigation system is a rough map image, the shape of the intersection is generally represented by a simple cross line. On the other hand, intersections have various shapes, and the circumference of the intersection may be covered with walls, trees, or may be on slopes.
[0013]
However, in the conventional method as described above, since such shape information of intersections and information on risk factors are not distributed, there is a problem that the driver still lacks information on safe driving.
[0014]
The present invention has been made in view of the above problems, and it is an object of the present invention to obtain a traffic information providing system which provides the shape of an intersection, the shape of a danger point, the degree of danger, the cause and the like while moving a vehicle.
[0015]
[Means for Solving the Problems]
A traffic safety information provision method of the present invention has a navigation function, a position measurement function, and a mobile phone function mounted on a mobile body.MobileMobile phone network from the server side to the terminal, InternetVia a communication network consisting ofRoute hazards on the map that the terminal requestsEvery timeIn the traffic safety information provision method which provides information,
The terminal is
A first memory storing navigation map data of a mobile body to which latitude and longitude are assigned; and a second memory in which a dangerous area on the road of the navigation map data and link information of the dangerous area are stored,The navigation map data is displayed on the screen, and a route from the departure point of the map on the screen to the destination is retrieved from the navigation map data of the first memory and displayed on the screen, and the route is communicated Said server over the networkAnd the position measured by the position measurement function., Third Loading into memory,Sent from the serverTheDangerous area of the route andThe link information linked to the danger areaTheStore in the second memoryStage,
Every time the self-location is determined, the traveling direction is determined from the previous self-location and the current self-location, and the dangerous area of the route existing in this traveling direction is determined.From the second memorySearch and the dangerous areaOn the route of the map of the screenTogether with the allocation corresponding to the allocated dangerous areaLink informationTheDisplay on the screenStage and the self positionOn the root of the screenWhen it no longer exists in the allocated risk area,Link informationOn the screen ofdisplayas well asDangerStopping the allocation of the area.
[0016]
The server is
And a fourth memory storing map data to which latitude and longitude are allocated.,In the danger area of the road of the map data, the danger areaPolygons indicating the shape of the information provided in the danger area, degree of dangerinformationSaidLinkAssociate informationWith the fifth memory to memorizeEquipped with
The dangerous area which receives the route from the terminal and exists on the routeLinkInformation andRead from the fifth memorySaidTerminalSend to
The point is that it is equipped with
[0017]
In addition, traffic safety information provision of the present inventionThe program isDanger of the route on the map with navigation function, position measurement function and mobile phone function mounted on mobileEvery timeTraffic safety information offer that provides informationIs a program of
[0018]
On the computer,
Means for storing navigation map data of a mobile body to which latitude and longitude are assigned, in a first memory, dangerous area on the road of the navigation map data and link information of the dangerous area in a second memory,Means for displaying the navigation map data on the screen, searching the navigation map data of the first memory for the route from the departure point of the map on the screen to the destination, and displaying the route information on the screen The server via the communication networkMeans for transmitting the information, and the own position measured by the position measuring function,, Into the third memory, A dangerous area of the route transmitted from the server, and the dangerous areaLink information linked toTheIn the fourth memoryMeans for storing, every time the own position is determined, the traveling direction is determined from the previous own position and the current own position, and the dangerous area existing in this traveling direction isFrom the fourth memoryMeans for searching the dangerous areaOn the route of the map of the screenTogether with the allocation corresponding to the allocated dangerous areaLinkInformation aboveDisplay on screenMeans, when the own position no longer exists in the allocated danger area,LinkInformation of the aboveDisplay on screenas well asDangerAs a means to stop the area allocationTo make it workIs a program for providing traffic safety information.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1
FIG. 1 is a schematic block diagram of a traffic information providing system according to the first embodiment. The system shown in FIG. 1 mounts navigation devices 1 in a vehicle 2. The navigation devices 1 are traffic information from the traffic safety information center 10 via the mobile telephone network 5 and the Internet 6 (shape of intersection, degree of risk Etc.).
[0020]
The above-described navigation device 1 includes a car navigation dedicated device 3 connected to a mobile phone or a portable information terminal 4 (mobile personal computer) incorporating a GPS function (including DGPS), a mobile phone function, a car navigation function and the like. In addition, it may be a GPS-equipped mobile phone.
[0021]
In addition, the traffic safety information provision center 10 sends information on traffic safety to the DB server 11 from the personal computer 8 (police, road management office JAF, etc.) of the traffic safety organization group connected to the Internet 6 and the personal computer 9 of general citizens. The information is collected, and the shape of the dangerous place (intersection) on the route from the navigation device 2, the degree of danger, and the like are automatically transmitted to the traffic safety information server 12 which is a Web server.
[0022]
The navigation device 1 includes a PC car navigation software 3a that downloads a traffic information service program using a mobile phone connected to the car navigation dedicated machine 3 and performs the following processing.
[0023]
The car navigation software 3a displays a car navigation map of a desired area on the screen, and when a destination point Pp (feature) is designated on the car navigation map, a route Ri to the destination point Pp is obtained, and this route Ri (Latitude and longitude Gi: G1, G2, ...) are transmitted.
[0024]
Then, as shown in FIG. 2, the GPS acquires current position information Gi of the vehicle (S201), and the current position Gi is displayed on the car navigation map (S202), and the current position Gi is an accident history point. It is determined whether it has approached (intersection, curve, etc.) (S203).
[0025]
Next, when it is determined that the accident history point (intersection) is approached, a file storing accident history information on the route Ri previously transmitted from the traffic safety information provision center 10 is allocated (S204), the accident history point Shape and risk level are extracted (S205).
[0026]
Then, a screen is displayed in the vicinity of the accident history point (intersection) on the screen to inform the user of the degree of danger according to the degree of danger, and is notified by voice (S206).
[0027]
In this screen, as shown in FIG. 2, the intersection of the road is indicated by hatching, and the type of the intersection (no cornering, cornering shape) is also displayed (in voice).
[0028]
Therefore, since the driver knows the type of the shape of the intersection, the driver can imagine in advance how to turn the steering wheel in accordance with the shape of the intersection.
[0029]
In addition, the navigation device 1 incorporates a communication modem, and enables connection to a mobile phone network and the Internet by a mobile phone function (connecting a mobile phone of a packet communication system). In other words, it analyzes Web data such as a program described in HTML (Hyper Text Markup Language), which is a language for describing hyper text format files, and displays and reproduces text, still images, moving images, etc. It has a browser function that enables browsing of (programs).
[0030]
On the other hand, as shown in FIG. 3, the traffic safety information provision center 10 is provided with a GIS database 15, an accident history database 16, an accident history update process (not shown) and the like in the DB server 11. In addition, the traffic safety information server 12 includes an intersection polygon generation step 17, an area buffer generation step 18, a linking step 19, an intersection information search step 20, a risk calculation step 21, an update processing 22 and the like. There is.
[0031]
The intersection polygon generation step 17 generates polygons Pi (including surrounding shapes such as ridges and trees) indicating the shape of the intersection designated by the operator on the map of the screen according to the instruction of the operator and stores the polygons in the polygon file 23 Do. For example, as shown in (a) of FIG. 4, polygons Pi whose corners have a square shape, a round shape, or a non-cornered corner are generated.
[0032]
Further, as shown in FIG. 4B, the area buffer generation step 18 generates a circle (also referred to as a danger area buffer Hi) having a radius equal to the predetermined distance ri from the center of the intersection. A mesh number mp in the road boundary is assigned to the area buffer Hi (also referred to as a danger point ID).
[0033]
Then, as shown in FIG. 3, the linking process 19 includes accident history data of the DB server 16.
For example, a polygon Pi in the form of an intersection, a danger degree rank and the number of accidents, an accident history, surrounding information on the intersection, a warning message, etc. are linked and stored in the ID of the base danger point.
[0034]
That is, as shown in (c) of FIG. 4 in the accident history database, the area buffer Hi (ID) of the intersection, the polygon Pi (corner type, round type, no corner cutting) and the risk (high safety) Medium safety, low safety, and other warning messages (surroundings at intersections (cars, trees), accident history (not shown), etc. will be stored.
[0035]
The updating process 22 corresponds to the intersection name every time information (for example, intersection name, shape of intersection, accident information of accident point, situation around the intersection, etc.) is transmitted from outside (traffic safety organization, citizen) Assign the file having the dangerous area ID to update the related information with the transmitted information.
[0036]
In addition, each time the risk calculation process 21 updates information in the accident history database (number of accidents, accident history, traffic volume at intersections, construction at intersections, surrounding height, on-street parking in shopping streets, etc.) The risk level is newly determined and updated to the obtained risk level. Further, the degree of danger may be determined and notified using the slope (curve etc.) of the road as information.
[0037]
The degree of danger is obtained from the accident history by a method of informing the degree of danger registered in advance and the speed from the previous position every time the own vehicle position Gi accompanied by traveling is input, and the speed and information of the accident history The degree of risk may be determined and notified by voice. Further, the degree of danger may be determined and notified using the slope (curve etc.) of the road as information.
[0038]
The intersection information search process 20 searches the accident history database for information having the danger point ID on the route Ri every time the route Ri from the vehicle 2 is input, and uses the transmission processing to search for the navigation device of the vehicle 2 Send to Category 1.
[0039]
The traffic information providing system configured as described above will be described below using the sequence diagram of FIG.
[0040]
(When the car navigation map is on navigation device 1)
In the present embodiment, as shown in FIG. 5, the traffic safety information provision center 10 accesses the terminal 8 of the traffic safety organization to collect information on dangerous points (intersections, curves, etc.) of the road (d1, d2) ) And the provision of information on dangerous places from the general public's personal computer 9 (d3). Then, based on these pieces of information, the dangerous place in the GIS (Geographic Information System) of the DB server 11 is analyzed (d4), and the analysis result is updated (d5). This dangerous place is described as an intersection in the present embodiment.
[0041]
In addition, it is assumed that the navigation device 1 of the vehicle 2 displays the car navigation map and the route Ri from the current position to the destination is displayed on the screen (d6).
[0042]
When the driver of the vehicle 2 operates the navigation device 1 to operate the safety request key (d7), the software 3a of the navigation device 1 receives the URL of the traffic safety information center 10 and the route Ri via the mobile phone network. (G1, G2,...) And transmit a safety information request command and a password (d8).
[0043]
Along with this transmission, the provider 7 assigns an IP address to the navigation device 1 if the login name, password, and communication environment setting of the navigation device 1 can be used, and the URL is provided to the traffic safety information provision center 10. Sent to.
[0044]
Next, when the route Ri is input, the server 12 of the traffic safety information provision center 10 searches the DB server 11 for all the danger area information Bip including the point coordinates Gi of the route Ri (locus) (d9).
[0045]
The danger area information Bip includes a danger area buffer Hi (which may be an ID), a danger degree bp, a danger area shape Pi, and the like.
[0046]
Then, all the danger area information Bip retrieved is transmitted to the navigation device 1 of the vehicle 2 (d10) and downloaded (d11).
[0047]
On the other hand, the navigation device 1 acquires the own vehicle position Gi from the GPS function, and performs safety information service display processing on the route Ri while moving (d12).
[0048]
The process at the time of the safety information request in the navigation device 1 and the safety information service display process will be described below with reference to the flowcharts of FIGS. 6 and 7. In FIG. 1, it is described as PC car navigation software.
[0049]
With the input of the safety information request, the locus of the route Ri (GP1, GP2,...) Obtained on the navigation image is read (S601), and the navigation allocated to this locus is read. Map coordinates Ri (G1, G2,...) Are transmitted (S602).
[0050]
Next, it is determined whether the transmission of the route Ri has been completed (S603), and if it has not been completed, the process returns to step S602.
[0051]
If it is determined in step S603 that the transmission of the route Ri has ended, it is determined whether the dangerous area information Bip has been received from the traffic safety information provision center 10 (S604), and downloaded to the memory (S605).
[0052]
Then, after reading the danger area information Bip (Bip1, Bip2,...), The danger area Hi of the danger area information Bip is made to correspond to the route Ri (S606). For example, the risk area information Bip having the danger area Hi is linked and stored centering on Gi (using Gtp to distinguish) on the route Ri corresponding to the central coordinate Ghp of the danger area Hi of the danger area information Bip Do.
[0053]
Next, it is determined whether there is any other danger area information Bip transmitted from the traffic safety information provision center 10 (S608).
[0054]
In step S608, when there are other dangerous area information Bip in the transmitted route Ri, the next dangerous area information Bip is updated (S609), and the process returns to step S607.
[0055]
Then, the safety information service display process reads the own vehicle position Gi every time the own vehicle position Gi is input (S 701). Next, the traveling direction of the vehicle is determined from the current vehicle position Gi and the previous Gi, and the dangerous area Hi (referred to as Hip for discrimination) on the route Ri that arrives first in this traveling direction is It is determined whether there is any (S702).
[0056]
If it is determined in step S702 that there is a danger area Hip, the danger area information Bip corresponding to the hip is read (S703), and a polygon Pi indicating the shape of the intersection linked to the danger area information Bip and a message mi And is displayed on the navigation image to generate a message (S705, S706). For example, as shown in FIG. 8, when the navigation system approaches the area buffer of the intersection to a certain extent, a message indicating that "there is an intersection with risk degree rank A ahead of this" is displayed and a voice is generated. And when it gets closer to the intersection, it tells that it will be an intersection soon.
[0057]
In addition, the intersection is indicated by blinking, and the danger degree rank, the number of accidents, the contents of the accident, the situation around the intersection and the like are displayed on the polygon image 15 of this intersection as a message and transmitted by voice.
[0058]
Around the intersection of the polygon image 15 of FIG. 8, the eyelid polygon and the polygon Pi indicating the shape of the intersection are displayed.
[0059]
Next, the safety information service display process reads the next own vehicle position Gi input (S 707), and determines whether the next own vehicle position Gi input has left the danger area Hip (S 708).
[0060]
If it is determined in step S708 that the danger area Hip has been exited, the polygon image 15, the message, and the blinking are stopped (S709). That is, the danger area Pi clears the message.
[0061]
Next, it is determined whether or not the host vehicle position Gi has left the last danger area Hi on the route Ri, and if it has not, the processing is returned to step S701 and the above processing is performed.
[0062]
Second Embodiment
(When the car navigation map is not in navigation devices)
In the first embodiment described above, it is described that the car navigation device 1 has the navigation map in advance, but in the second embodiment, the car navigation devices without the car navigation map (for example, mobile phone function, browser function, GPS) A mobile personal computer having a function, an i-mode (registered trademark) telephone, etc. may be used.
[0063]
In such a case, the center side has a map and traffic information service program. The distribution of the navigation map of this map is preferably received from the car navigation maker.
[0064]
FIG. 9 is a sequence diagram for explaining the second embodiment. (When the car navigation map is on navigation device 1)
As shown in FIG. 9, the traffic safety information provision center 10 receives the distribution of navigation images of each prefecture and area from the car navigation maker at regular intervals, and stores it in the DB server (d0).
[0065]
In addition, (d1, d2), which accesses the terminal 8 of the traffic safety organization to collect information on dangerous points (intersections, curves, etc.) of the road, provides information on dangerous points from the general public's personal computer 9 Received (d3). Based on these pieces of information, the dangerous place in the GIS (Geographic Information System) of the DB server 11 is analyzed, and the analysis result is updated.
[0066]
On the other hand, the mobile personal computer of the vehicle issues the URL code of the center 10 to receive the provision of the homepage of the traffic safety information service (d20, d21).
[0067]
Next, when the navigation key is selected, the mobile personal computer sends a navigation image distribution request to the center and receives distribution of a program for displaying a navigation image from the center (d22, d23).
[0068]
Then, a necessary area name (or a plurality of area names) is selected from the area names displayed on the screen (also referred to as a required area name ki), and transmitted to the center (d24).
[0069]
The center receives the required area ki, and transmits a navigation image corresponding to the required area name ki to the mobile personal computer of the vehicle (d25). The mobile PC downloads the navi image sent from the center.
[0070]
Then, the driver of the vehicle displays a map of the destination on the screen, and sets the destination on the map. Along with the setting of the destination point, a route Ri from the vehicle position Gi to the destination point is obtained and displayed on the map (d26).
[0071]
Then, when the driver selects a request key of the safety information service, the driver transmits a route Ri (G1, G2,...), A safety information request command, a password and the like (d27). Next, when the route Ri is input, the traffic safety information provision center 10 searches the DB server 11 for all the danger area information Bip including the point coordinates Gi of the route Ri (locus) and sends it to the mobile personal computer of the vehicle To do (d28).
[0072]
Then, the mobile personal computer of the vehicle obtains the same vehicle position Gi as in the above embodiment, and performs safety information service display processing on the route Ri while moving (d29).
[0073]
That is, when position coordinate information Gi is acquired, it is determined whether the present position Gi has approached an accident history point (such as an intersection), and traffic safety information is provided when it is determined that an accident history point (an intersection) is approached. A file in which accident history information of the route Ri previously transmitted from the center 10 is stored, and the shape of the accident history point and the risk level are extracted. Then, a screen (shape of the intersection, a message, etc.) is displayed in the vicinity of the accident history point (intersection) on the screen to inform the user of the degree of danger according to the danger level.
[0074]
Embodiment 3
Hereinafter, specific examples will be described.
[0075]
First, as a specific example, an example of the risk factor parameter for setting the risk will be described. In the present embodiment, the risk factor parameter is stored as table data in the traffic safety information server 12 for each of the risk rank, accident history, characteristics of the road facility, and characteristics of the intersection.
[0076]
FIG. 10 is a danger degree rank setting table TBLk. As shown in the figure, the degree of risk rank constructs road segment graphic data (having a polygon or line shape), with the road segment from one intersection to the next intersection as one unit. Then, the degree of risk rank increases, for example, to 2, 3, 4, 5, 6, 7, 8, 9 as the degree of risk becomes higher, with the weighting score being “1” when the degree of risk is the lowest. The weighting score when the degree of danger is the highest is set to "10".
[0077]
FIG. 11 is an accident history setting table TBL0. As shown in the figure, the accident history is set to each weighting score in the order of the level of the accident content, for example, property damage accident, personal injury accident (slight injury), personal injury accident (severe injury), personal injury accident (death).
[0078]
FIG. 12 shows setting tables TBL1 to TBL7 of characteristics of road facilities. The property of the road facility divides the property of the road facility into each risk factor and sets the degree of risk according to the degree of each property. Here, as a risk factor, for example, road width TBL1, traffic volume TBL2, down slope TBL3 to know whether it is easy to go downhill, up slope TBL4 to know if it is hard to see ahead on uphill, curves Curve radius of curvature TBL5, TBL6 with many traffic, and TBL7 with many on-street parking.
[0079]
FIG. 13 is a setting table TBL8 to 10 of the characteristics of the intersection. Also for the characteristics of intersections, for each risk factor, set the degree of risk according to the degree of each characteristic. Here, for example, the road cornering shape TBL8, the obstacle TBL9 near the intersection, and the signal display TBL10 are classified into three, and in the cornering shape TBL8 of the intersection, for example, round, square, no cornering, intersection In the nearby obstacle TBL9, for example, a fence, a road tree, a low block fence, a high block fence, and in the signal display TBL10, for example, normal, straight ahead, short left turn time, short right turn time, etc. Set the level of risk.
[0080]
Next, the procedure of the risk level evaluation process will be described.
[0081]
FIG. 14 is a main flowchart showing the procedure of the risk level evaluation process.
[0082]
The illustrated flowchart is a processing procedure for evaluating the degree of risk for each road section graphic data (having a polygon or line shape) from one intersection to the next intersection.
[0083]
First, the degree of danger rank by accident history (hereinafter referred to as rank 1), the degree of danger rank by road shape (hereinafter referred to as rank 2), and the degree of danger rank by speed (hereinafter referred to as rank 3) It initializes (S1101).
[0084]
Then, each risk factor parameter of rank 1 (ie road width, traffic volume, uphill is hard to see ahead, downhill is easy to go out, speed is easy on curve, poor visibility on curve, lots of traffic, lots of on-street parking)) , The risk factor parameters of rank 2 (that is, the corner round shape of the intersection, the obstacle near the intersection, the signal indication), and the risk factor parameters of rank 3 are respectively initialized, for example, with the score of 0 (S1102).
[0085]
Subsequently, the intersection approach flag (KS), the curve approach flag (CS), and the slope approach flag (SS) are initialized to 0 (S1103).
[0086]
Then, as each risk factor parameter of the moving road section, by referring to the road width by TBL1, by referring to the traffic volume by referring to TBL2, by referring to the traffic degree by referring to TBL6, by referring to the road parking degree by referring to TBL7 It acquires each and adds the score to danger rank 2 (S1104).
[0087]
Specifically, for example, if there is one place “road width 6 m or more and less than 10 m” and “one road width 4 m or more and less than 5 m” on the route from here, the score of the risk factor parameter is TBL1. From 5 points × 1 time + 7 points × 1 time = 12 points, and if there are 1 place that “very low” traffic volume and 1 “very high location”, the score of the risk factor parameter is from TBL 2 1 point x 1 time + 9 points x 1 time = 10 points, and if the degree of human traffic is "less" once, the score of the risk factor parameter becomes 3 points x 1 time + 3 points from TBL 6 If the degree of parking on the street is "very low" and once "high", the risk factor parameter score is 1 point × 1 + 7 points × 1 = 8 points from TBL7.
[0088]
In setting of these parameters, road width is registered by GIS measurement or design value, traffic by planned or actual measurement, and traffic and traffic by traffic provision and traffic information, police, residents etc. Do.
[0089]
Next, the process proceeds to the subroutine processing SUB1 of the risk rank 1 according to the past accident history, and the evaluation by the risk rank 1 is performed. Here, the risk rank is evaluated for the approaching accident history point, and the user is notified of the front risk (S1105). The details of the processing of SUB1 will be described later.
[0090]
Subsequently, current position information Gi is acquired by GPS (S1106), and the current position is plotted on the road (S1107). Then, the current speed is measured from the moving amount per unit time by the vehicle speed pulse sensor or the GPS (S1108). When it asks from GPS, it asks from the following formula.
[0091]
Speed = (((X coordinate movement amount) 2 + (Y coordinate movement amount) 2) / unit time
In addition, acquisition by measurement of the present position coordinate by GPS shall be performed once every 0.2 second as unit time, for example.
[0092]
Subsequently, if the vehicle is currently stopped (speed = 0), the process is ended, and if the vehicle is traveling (speed> 0), the process proceeds to the current position determination process (S1109). If the movement is resumed (speed> 0) after the processing ends, the processing is resumed from the initial processing.
[0093]
Subsequently, in order to determine the current position, the space operation (overlay) processing of the point at the current position and the danger area buffer Hi having a radius of a predetermined distance ri from the center of the intersection as an approaching road facility is performed. In this way, it is determined whether or not the intersection is approached (S1110). Here, when approaching an intersection, the intersection approach flag KS is set to 1 (S1120). On the other hand, if it is not an approach to the intersection, the process proceeds to the next process.
[0094]
Subsequently, a space operation (overlay) process is performed with the point at the current position and the danger area buffer Hi having a radius of a predetermined distance ri from the center of the curve (arc data) as the approaching road facility. Thus, it is determined whether or not the curve has been approached (S1111). Here, when approaching a curve, the curve approach flag CS is set to 1 (S1121). On the other hand, if it is not the approach to the curve, the process proceeds to the next processing.
[0095]
Then, with the point at the current position and the danger area buffer Hi whose radius is a predetermined distance ri from the center of the slope section of the slope (an arc on the elevation but substantially straight line data on the plane) as the approaching road facility. Perform the space operation (overlay) process of As a result, it is determined whether or not a slope is approached (S1112). Here, when approaching a slope, the slope approach flag SS is set to 1 (S1122). On the other hand, if it is not the approach to the slope, the processing shifts to the next processing.
[0096]
Subsequently, it is determined whether any one of an intersection, a curve, and a slope is approached (S1113). Here, when approaching an intersection, a curve, or a slope, that is, when KS ≠ 0 or CS ≠ 0 or SS ≠ 0, the process proceeds to the risk evaluation processing SUB2 (S1114) during traveling. Then, after the processing of SUB2 ends, the processing returns to step S1106 in order to repeat the loop processing for each unit time (S1115). On the other hand, if any one of the intersection, the curve and the slope is not approached (case of KS = 0, CS = 0, SS = 0), the process advances to processing S1106 to repeat the loop processing for each unit time as it is ( S1115).
[0097]
Next, the subroutine processing SUB1 of the risk rank 1 based on the past accident history will be described.
[0098]
FIG. 15 is a flowchart showing the procedure of the subroutine processing SUB1.
[0099]
First, the current position information Gi of the vehicle is acquired by GPS (S1201), and the current position Gi is displayed on the car navigation map (S1202), and the current position Gi is an accident history point (intersection, curve, etc.) It is judged whether it approached (S1203).
[0100]
Subsequently, when it is determined that the accident history point (intersection) is approached, a file storing accident history information on the route Ri previously transmitted from the traffic safety information provision center 10 is allocated (S1204), accident history DB The contents of each accident and the number of times are read from (S1205).
[0101]
Then, according to the accident history table (TBL0), weighting points are added for each item content (S1206).
[0102]
For example, in the case of accident history, 1 personal injury (light injury), 1 personal injury (death), the risk factor parameter score is 6 points x 1 + 10 points x 1 = 16 points from the accident history table (TBL0) Become.
[0103]
Subsequently, based on the calculated score, the state of the risk degree rank 1 is extracted (S1207).
The state of the degree of danger rank 1 is obtained from the evaluation table TBL11 based on the accident history shown in FIG. In the case of the above score, the risk rank 1 is "B". In addition to the evaluation table TBL11 based on the accident history, FIG. 16 shows an evaluation table TBL12 based on the road facility shape described later and an evaluation table TBL13 based on the speed, each table corresponds to the score of the risk factor parameter Color classification is set for each rank when ranking and displaying each degree of danger on the screen.
[0104]
Subsequently, a screen for informing the degree of danger corresponding to the extracted degree of danger rank 1 is opened, and it is notified by voice (S1208). An example of screen display will be described later.
[0105]
Next, the subroutine processing SUB2 of risk evaluation during traveling will be described.
[0106]
17 to 19 are flowcharts showing the procedure of the subroutine processing SUB2.
[0107]
The subroutine processing SUB2 of hazard level evaluation at the time of traveling first determines whether the intersection approach flag KS = 1 (S1301). Here, if KS = 1, subsequently, as the risk factor parameters, the corner cut shape of the intersection is referred to by TBL8, the presence or absence of an obstacle near the intersection is referred to by TBL9, and the signal display time is long or short TBL10. Are acquired, and the score is added to the risk degree rank 2 (S1302).
[0108]
Specifically, for example, at the intersection approaching from now on, if the corner cut shape of the intersection is "square", the score of the risk factor parameter becomes 3 points from TBL 8 and the obstacle near the intersection is "street tree" 1 If there is a portion, the score of the risk factor parameter is 5 points × 1 time = 5 points from TBL9, and if the signal display time is “normal”, the score of the risk factor parameters is 1 point = 1 point from TBL10.
[0109]
Subsequently, current position information Gi is acquired by GPS (S1303), and the current position is plotted on the road (S1304). Then, overlay processing of the intersection polygon and the current position polygon is performed (S1305).
[0110]
Subsequently, it is determined whether the current location is within an intersection polygon (S1306). Here, if it is outside the intersection polygon, it is judged whether or not the intersection entry flag KE = 1 (S1320), and when KE = 1, that is, when passing an intersection, the intersection approach flag KS = 0 and the intersection entry flag KE = It is set to 0 (S1330), and then the process proceeds to step S1401.
[0111]
On the other hand, if the current position is inside the intersection polygon, that is, when entering an intersection, the intersection entry flag KE = 1 is set (S1307), and the current speed is measured from the moving amount per unit time by the vehicle speed pulse sensor or GPS (S1306) .
[0112]
Then, the process shifts to the calculation processing SUB3 of the risk level rank 3. After the process of the calculation process SUB3 of the risk degree rank 3, the process returns to step S1303. The calculation process of the risk degree rank 3 will be described later.
[0113]
Next, when the process proceeds to step S1401 (see FIG. 18), it is determined whether or not the curve approach flag CS = 1. Here, if CS = 1, then the curve radius of curvature is extracted from the design value of the curve or the GPS measurement value (S1402). Then, a risk factor parameter is obtained from the curve radius of curvature by referring to TBL5, and the score is added to the risk degree rank 2 (S1403).
[0114]
Specifically, for example, in a curve approaching from here on, if there is one place close to a straight line and one place with a curvature radius of 40 to 50 m, the score of the risk factor parameter is 1 point × 1 time + 5 from TBL 5 The point x 1 time = 6 points.
[0115]
Subsequently, current position information Gi is acquired by GPS (S1405), and the current position is plotted on the road (S1406). Then, overlay processing of the curve line and the current position polygon is performed (S1407).
[0116]
Subsequently, it is determined whether the current location is on the curve line (S1408). Here, if it is outside the curve line, it is judged whether or not the curve entry flag CE = 1 (S1420), and when CE = 1, that is, when passing the curve, the curve passing approach flag CS = 0, the curve entry flag CE It is set to 0 (S1430), and then the process proceeds to step S1501.
[0117]
On the other hand, if the current position is inside the curve line, that is, when entering a curve, the curve entry flag CE is set to 1 (S1409), and the current speed is measured from the moving amount per unit time by the vehicle speed pulse sensor or GPS (S1410) ).
[0118]
And it transfers to calculation processing SUB3 of danger rank 3 (S1411). After the process of the calculation process SUB3 of the risk degree rank 3, the process returns to step S1405. The calculation process of the risk degree rank 3 will be described later.
[0119]
Next, when the process proceeds to step S1501 (see FIG. 19), it is determined whether or not the slope approach flag SS = 1. Here, if SS = 1, then the slope of the slope is extracted from the slope design value or GPS measurement value (S1502). Then, the risk factor parameter is acquired from the gradient of the extracted slope by reference to TBL3, and when climbing, it is acquired by reference to TBL4, and the acquired score is added to the risk degree rank 2 (S1503).
[0120]
Specifically, for example, when going downhill on a slope approaching from here, if there is one flat part and one place with a gradient of 6 to 8%, the score of the risk factor parameter is 1 point from TBL 3 Once + 6 points x 1 = 7 points.
[0121]
Subsequently, current position information Gi is acquired by GPS (S1505), and the current position is plotted on the road (S1506). Then, overlay processing of the slope line and the current position polygon is performed (S1507).
[0122]
Subsequently, it is determined whether the current location is on the slope line (S1508). Here, if it is outside the slope line, it is judged whether or not the slope entry flag SE = 1 (S1520), and when SE = 1, that is, when passing the slope, the slope passing flag SS = 0 and the slope entry flag SE After setting the flag to 0 (S1530), SUB2 ends, and the process returns to step S1115 of the main routine.
[0123]
On the other hand, if the current position is inside on the slope line, that is, at the top of the slope, the slope approach flag CE is set to 1 (S1509), and the current speed is measured from the moving amount per unit time by the vehicle speed pulse sensor or GPS (S1510). ).
[0124]
And it transfers to calculation processing SUB3 of danger rank 3 (S1511). After the risk rank 3 calculation processing SUB3, the processing returns to step S1505. The calculation process of the risk degree rank 3 will be described later.
[0125]
If SS is not 1 in step S1501, the slope approach flag SS is 0 and the slope entry flag SE is 0 (S1530), SUB2 ends, and the process returns to step S1115 of the main routine.
[0126]
Next, the subroutine processing SUB3 of the risk level rank 3 will be described.
[0127]
FIG. 20 is a flowchart showing the procedure of the subroutine processing SUB3.
[0128]
In the subroutine processing SUB3 of the danger level 3, first, it is judged whether the intersection approach flag KS is 1 or not (S 1601). Here, if KS = 1, the score of the risk factor parameter of the risk rank 3 is calculated based on the current speed obtained in the above-mentioned subroutine SUB2 processing and the road width of the road crossing the road currently being traveled, It calculates | requires from speed and evaluation table TBL21 at the time of intersection approach (S1602).
[0129]
Here, as shown in FIG. 21, the speed and evaluation table TBL21 at the time of approaching an intersection correspond to the road width for each speed range, and are assigned points of risk factor parameters. Specifically, for example, when crossing a road with a road width of 40 m and a speed of 58 km / h, the score of the risk factor parameter is 5 points from TBL 21.
[0130]
If KS is not 1 in step S1601, it is determined whether the curve approach flag CS is 1 or not (S1611). Here, if CS = 1, the score of the risk factor parameter of the risk rank 3 is calculated based on the current speed obtained in the above-mentioned subroutine SUB2 processing and the curvature radius of the curve, and the speed and curve approaching evaluation table It is obtained from TBL 22 (S1612).
[0131]
Here, the speed and the curve approaching evaluation table TLB 22 correspond to the radius of curvature of the curve for each range of speed, as shown in FIG.
[0132]
If CS is not 1 in step S1611, it is then determined whether a slope approach flag SS is 1 or not (S1621). Here, if SS = 1, the score of the risk factor parameter of the risk rank 3 is calculated based on the current speed obtained in the above-mentioned subroutine SUB2 processing and the road grade based on the speed and slope evaluation table TBL23 It asks for (S1622).
[0133]
Here, as shown in FIG. 23, TBL 23 corresponds to the slope slope for each speed range, and is assigned a score of the risk factor parameter.
[0134]
After completion of the above processes, the user is notified of the risk rank 2 added earlier by referring to the evaluation table TBL12 according to the road facility shape, and the user is notified of the result of the risk rank 3 (S1630) .
[0135]
Here, from the result mentioned above as a specific example, the risk degree rank 2 is 46 points in total, so TBL 12 (see FIG. 16) becomes “c” and the danger degree rank 3 is “5” is there.
[0136]
Next, a display example of each risk degree rank obtained by the above-described processing will be described.
[0137]
FIG. 24 is a diagram showing an example of a screen display for displaying the degree of risk rank to the user.
[0138]
In the illustrated display example, color-coded display is performed in the lower right corner of the navigation screen according to the degree of danger rank. The hazard rank 1 (evaluation by accident history) is “B” from the above specific example, which is displayed in pink from TBL 11 (see FIG. 16), and the hazard rank 2 (evaluation by road facility) is the above concrete From the example, "c" is displayed from TBL12 (see FIG. 16) to orange, and the risk rank 3 (evaluation by speed and road shape) is "5" from the above specific example, which is TBL13. The display becomes orange from (see FIG. 16).
[0139]
As a result, the degree of risk is displayed to the user based on the accident history, the road shape, the current speed, etc. which are ahead.
[0140]
As a display example, in addition to this, for example, all the risk ranks 1 to 3 are added, and from the value, color-coded display is performed by three steps or five steps or displayed on the navigation screen. It is possible to take various methods such as displaying the figures themselves such as intersections, curves, slopes etc. in different colors according to the danger rank and flashing them in a cycle according to the degree of danger. Furthermore, the degree of danger may be notified by voice. In the case of informing by sound, all the degrees of danger may be notified, or only in the case where the degree of danger is high, it may be informing by sound.
[0141]
Furthermore, the degree of danger may not only be notified by a display or a voice, but may be notified by a display or a sound of a safe passing speed together with a notice of the degree of danger.
[0142]
【Effect of the invention】
As described above, according to the present invention, when the mobile terminal transmits a route to the destination point set in the navigation map to the server via the mobile phone network and the Internet, the server side transmits all the intersection areas on the route. And, attribute information including polygons indicating the shape of intersections, provided information, and degree of danger is transmitted.
[0143]
On the other hand, the mobile terminal stores the intersection area and attribute information on this route, and when there is an intersection area in the traveling direction determined from the previous self position and the current self position, the attribute information of this intersection area Inform.
[0144]
That is, the information on the shape of the intersection where the moving object reaches next (corners, corners, no corners, circles, surrounding blocks, etc. is notified, and the degree of danger is notified.
[0145]
For this reason, since a driver will arrive at an intersection by imaging the shape of the intersection, the degree of danger, etc., safe driving becomes possible.
[0146]
In addition, since information related to the intersection is constantly collected from external groups, citizens, etc., and this is reflected in the degree of danger, it is possible to provide the degree of danger according to the current situation of the intersection.
Brief Description of the Drawings
FIG. 1 is a schematic configuration diagram of a traffic information providing system according to a first embodiment.
FIG. 2 is a flowchart schematically illustrating Embodiment 1;
FIG. 3 is a configuration diagram for explaining a traffic safety information provision center.
FIG. 4 is an explanatory view for explaining polygons at intersections and danger information.
FIG. 5 is a sequence diagram of the first embodiment.
FIG. 6 is a flowchart illustrating an operation of the navigation device side.
FIG. 7 is a flowchart for explaining the operation of the navigation device side.
FIG. 8 is an explanatory diagram for explaining a traffic safety information service screen.
FIG. 9 is a sequence diagram for explaining the second embodiment;
FIG. 10 shows a danger degree rank setting table TBLk.
FIG. 11 is a diagram showing an accident history setting table TBL0.
FIG. 12 is a diagram showing setting tables TBL1 to TBL7 of characteristics of road facilities.
FIG. 13 is a view showing setting tables TBL 8 to 10 of characteristics of intersections.
FIG. 14 is a main flowchart showing a procedure of risk degree evaluation processing.
FIG. 15 is a flowchart showing a procedure of subroutine processing SUB1 of danger rank 1 based on a past accident history.
FIG. 16 is a view showing an evaluation table TBL11 based on accident history, an evaluation table TBL12 based on a road facility shape, and an evaluation table TBL13 based on speed.
FIG. 17 is a flowchart showing a procedure of subroutine processing SUB2 of risk evaluation during running.
FIG. 18 is a flowchart showing the procedure of subroutine processing SUB2 of risk evaluation during traveling, following FIG. 17;
FIG. 19 is a flowchart showing a procedure of subroutine processing SUB2 of risk evaluation during traveling, following FIG. 18;
FIG. 20 is a flowchart showing a procedure of subroutine processing SUB3 of degree of risk rank 3;
FIG. 21 is a diagram showing an evaluation table TBL 21 when approaching a speed and an intersection.
FIG. 22 is a diagram showing an evaluation table TLB 22 at the time of approaching a speed and a curve.
FIG. 23 is a diagram showing an evaluation table TBL 23 when traveling on a slope and speed.
FIG. 24 is a diagram showing an example screen display of the degree of risk.
[Description of the code]
1 Navigation equipment
2 vehicles
5 Mobile phone network
6 Internet
10 Road Safety Information Center
11 DB server
15 GIS database
16 accident history database
17 Intersection polygon generation process
18 area buffer generation process
19 Linking process
20 intersection information search process
21 Risk calculation process